Suppression of Recombination Losses in Polymer:Nonfullerene Acceptor Organic Solar Cells due to Aggregation Dependence of Acceptor Electron Affinity - Cha,H; Fish,G; Luke,J; Alraddadi,A; Lee,HH; Zhang,W; Dong,Y; Limbu,S; Wadsworth,A; Maria,IP; Francas,L; Sou,HL; et al. (ADVANCED ENERGY MATERIALS, 2019)